So what's the general feeling with the RB25Turbo on the RB20DET? Little laggier, doesnt come onto boost until 5,000RPM but is stronger up top? That's 2,000RPM later then the RB20Turbo - hardly seems worth it for more top end surge. 2,000RPM later seems alot for a slightly larger compressor. I would of expected it to come onto boost at about the 3,500-4,000 RPM mark at the latest?